U.S., South Korea Conduct Joint Military Exercises After North Korean Missile Test04:46

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In this handout photo released by the South Korean Defense Ministry, U.S. M270 Multiple Launch Rocket System firing an MGM-140 Army Tactical Missile during a U.S. and South Korea joint missile drill aimed to counter North Korea's intercontinental ballistic missile test on July 5, 2017 in East Coast, South Korea. The U.S. Army and South Korean military responded to North Korea's missile launch with a combined ballistic missile exercise on Wednesday, into South Korean waters along the country's eastern coastline. (South Korean Defense Ministry via Getty Images)

After North Korea announced its successful test launch of an intercontinental ballistic missile, the U.S. and South Korea responded Wednesday with joint military exercises. But it will take more that that to deescalate tensions on the Korean Peninsula.

Here & Now's Lisa Mullins speaks with Kathleen Stephens(@AmbStephens), former ambassador to South Korea and fellow at the Asia-Pacific Research Center at Stanford University, about the challenges.